Yarn guide for twisting frames



July 13, 1943. V

J. FOSTER YARN GUIDE FOR TWISTING'FRAMES Filed July 29, 1942 Inventor Jmzzes Z 'aszer By w Patented July 13, 1943 YARN GUIDE FOR 'I'WISTING James Foster, Bristol, 3. 1.. minor of one-half to Joseph F.

Bl'llm, Bristol, R. 1.

Application July 29, 1942, Serial No. 452,778 2 Claims. (Cl. 242-154) My invention relates to improvements in yarn guides for twisting frames such as are used in twisting thread, the principal object in view being to provide a self-adjusting guide for imposing uniform tension through the filling of the bobbin so as to obviate breaking of the thread, to the end that better yam may be produced and operators enabled to run more spindles.

Other and subordinate objects are also comprehended by my invention, all of which, together with the precise nature of my improvements, will be readily understood when the succeeding description and claims are read with reference to the drawing accompanying and forming part of this specification.

In said drawing:

Figure 1 is a view in perspective of my improved guide in its preferred embodiment,

Figure 2 is a view in horizontal section taken on the line 2-2 of Figure 1, and

Figur 3 is a view in longitudinal vertical section taken on the line 3-3 of Figure 1.

Referring to the drawing by numerals, according to my invention, a porcelain guide block I, substantially rectangular in shape, is provided and a holder for the block comprising as its basic elements a pair of elongated top and bottom, plate-like sections 2, t, each including a flat tail extension 4, fitted together fiat. The tail extensions 4, 5 are provided with mating heyhole slots 4', 5' extending longitudinally thereof to accommodate a bolt 6 provided with clamping nuts l on opposite sides of said extensions and whereby the sections may be secured together, and th holder attached in a horizontally extended position to the frame of a twisting machine. Such machines being well known and understood in the art, it has not been deemed necessary to a clear understanding of the invention to illustrate the same. The bottom section 2 is formed, forwardly of its tail extension 5, with upstanding, side edge, flanges 8 and similar corner flanges 9 at its front end spaced apart upon opposite sides of a flaring keyhole slot I o extending inwardly from said front end in the longitudinal center of the section. A forwardly oflset keeper finger H extends from the upper portion of one corner flange 9 across the space between said flanges for a purpose presently seen. The top section 3 is formed at the front of the tail extensions thereof with a right angled, upstanding web l2 closing the open space between the rear ends of the side flanges 8, and a forwardly projecting upper front portion I3 overlywill be seen, the bottom section 2 with the flanges 8 and 9 thereof forms, together with the web I! and portion l3 of the upper section 4 a shell generally rectangular in form. An elongated slot l4 with a forwardly flaring mouth is provided in the longitudinal center of the portion l3.

The guide block I is slidably fitted in the described shell to move forwardly and rearwardly ing the upper edges of the side flanges 8. As

therein and is provided with a keyhole slot I5 extending rearwardly therein from its front face in vertical alignment with the slots l0 and I4 and having a flaring mouth, as at l B. A substantially u-shaped follower ll is slidably fitted in upstanding position in said shell to bear flat against the rear face of the block I and extends across the shell with right angled rearwardly extending flanges l8 adapted to bear against the side flanges 8. A coiled expansion spring I9 is interposed between the follower l1 and the web l2 and which has it ends suitably fixed to the follower and web and yieldingly establishes a forward limit of movement of the block I in said shell.

In the use of the described invention, the yarn thread, not shown, is extended downwardly through the slots l4, l5 and Ill to the bobbin, not shown. As will be understood, the thread rides against the block 8 and the block is backed by the spring is so that said block may give to ease the tension on the thread under pull on the latter and thereby maintain a uniform tension on the thread at all times. The described follower ll, by virtue of the described construction thereof, is designed to prevent binding of the same in the shell and also of the block l in its movement. The thread may be inserted in the guide by way of the trout end of the holder by passing the same between the keeper finger H and the adjacent parts of the holder.

il'he foregoing will, it is believed, sufilce to impart a clear understanding of my invention without further explanation.

Manifestly, the invention, as described, is susceptible or modification without departing from the inventive concept, and right is herein reserved to such modifications as fall within the scope of the subjoined claims.

What is claimed is:

l. A thread guide for attachment to a twis ing frame comprising an elongated rectangular shell having a pair of longitudinally extending top and bottom slots therein for passage of the in opposite directions, respectively, and provided with a central slot for straddling the thread, and spring mean in said shell yieldingly opposing movement of the block in one direction.

2. A thread guide for attachment to a twisting frame comprising an elongated rectangular shell having a pair of longitudinally extending top and bottom slots therein for passage of the thread through the shell and extension parts at one end thereof for attaching the same to said 10 frame, a rectangular guide block fitted in said shell for sliding movement lengthwise of the shell in opposite directions, respectively, and provided with a central slot for straddling the thread, and spring means in said shell yieldingly opposing movement of the block in one direction, said means including a follower slidable in said shell, and a spring urging the follower against one side of said block.

J AMES FOSTER. 

